Secrets Of printf-1.txt

My Secrets Of printf

testing

see: Secrets Of printf.pdf
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hex & octal get converted to ascii letter
printf "\x41\n"               # \xhh in format     hex -> ascii
printf "\101\n"               # \nnn in format     octal -> ascii

first character of string or variable gets converted to d,o,x
printf "%d\n" "'AB"           # ' in string        integer
printf "%x\n" "'$var"         # ' in string        hex
printf "%o\n" "'$var"         # ' in string        octal, used a lot in Linux
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BASH SCRIPT
I normally have LC_ALL=C, you need it unset for some thing s to work

unset LC_ALL

n=25                       # first column
p="'10"                    # ' thousands separator
s=123456                   # test number

printf "%-${n}s%s\n\n" "printf format" "output"

f="%-${n}s>%${p}d<\n"      # right just
printf "$f" "$f" "$s"
echo
f="%-${n}s>%+-${p}d<\n"    # left just +/- no leading zero
printf "$f" "$f" "$s"
f="%-${n}s>%+-${p}d<\n"
printf "$f" "$f" "-$s"
echo
f="%-${n}s>%-+${p}d<\n"    # left just +/- no leading zero
printf "$f" "$f" "$s"
f="%-${n}s>%-+${p}d<\n"
printf "$f" "$f" "-$s"
echo
f="%-${n}s>% -${p}d<\n"    # left just - no leading zero
printf "$f" "$f" "$s"
f="%-${n}s>% -${p}d<\n"
printf "$f" "$f" "-$s"
echo
f="%-${n}s>% +${p}d<\n"    # right just +/- leading zero
printf "$f" "$f" "$s"      # zeros not thousand separated BUG!
f="%-${n}s>% +${p}d<\n"
printf "$f" "$f" "-$s"
echo
f="%-${n}s>% ${p}d<\n"     # right just - leading zero
printf "$f" "$f" "$s"      # zeros not thousand separated BUG!
f="%-${n}s>% ${p}d<\n"
printf "$f" "$f" "-$s"
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OUTPUT

printf format            output

%-25s>%'10d<\n           >   123,456<     the ' thousands separator

%-25s>%+-'10d<\n         >+123,456  <     works for floating point too
%-25s>%+-'10d<\n         >-123,456  <

%-25s>%-+'10d<\n         >+123,456  <
%-25s>%-+'10d<\n         >-123,456  <

%-25s>% -'10d<\n         > 123,456  <
%-25s>% -'10d<\n         >-123,456  <

%-25s>% +'10d<\n         >  +123,456<     I like this
%-25s>% +'10d<\n         >  -123,456<

%-25s>% '10d<\n          >   123,456<     and this
%-25s>% '10d<\n          >  -123,456<



%-25s>% '010d<\n         > 00123,456<     no zero thousands separator BUG!
%-25s>% '010d<\n         >-00123,456<

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